Clear 5 Planes?

They tell you to clear 5 planes on level one. Okay, so that could mean many different things. With no instructions on how to play the game or what youre supposed to do, they just start you out with planes flying around. Okay so now what? Im moving them around, but how and where do you clear these planes? Awful app. Wouldnt recommend it to anyone.

VHgdatsb about ATC 4.0 Lite, v2.5